Update book.json

book.json

-{
-  "language": "de",
-  "gitbook": ">=3.0.0",
-  "plugins": ["image-captions", "local-video", "fancybox", "downloadpdf"],
-  "pluginsConfig": {
-       "theme-default": {
-           "showLevel": false
-       },
-       "image-captions": {
-        "caption": "Abbildung _PAGE_IMAGE_NUMBER_: _CAPTION_"
-      },     
-      "downloadpdf": {       
-          "base": "./book_pdf/book.pdf?",       
-          "label": "PDF laden",       
-          "multilingual": false     
-          
-      }
-     },
-   "styles": {
-     "website": "./styles/website.css",
-     "pdf": "./styles/pdf.css"
-   },
-   "title": "BiotechAll<p>Biotechnologie im Alltag</p>"
-}
\ No newline at end of file